| 摘要 |
<p>A lever 10 mounted on a support 12 for pivotal movement between two end positions is acted upon by a toggle spring 20 connected at its opposite ends to the lever 10 and the support 12 to bias the lever away from a centre position of unstable equilibrium towards its two end positions. In the invention, instead of using a conventional coil spring, the toggle spring 20 is constructed as a leaf spring. <IMAGE></p> |
